British Journal of Anaesthesia, 1971, Vol. 43, No. 12 1149-1155
© 1971 The Board of Management and Trustees of the British Journal of Anaesthesia
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A COMPARISON OF THE HYDROCHLORIDE AND CARBONATED SALTS OF LIGNOCAINE FOR CAUDAL ANALGESIA IN OUT-PATIENTS
The Royal Victoria Hospital and McGill University Montreal, Quebec, Canada
Plain solutions of 1.73 per cent carbonated lignocaine and the equivalent concentration of lignocaine hydrochloride were compared for caudal anaesthesia in 64 patients, 46 of whom were ambulatory out-patients. The carbonated solution produced rapid intense blockage 4.5 times faster than the hydrochloride solution, and the segmental spread of analgesia was 46 per cent more extensive. This was achieved with no increase in toxicity. The advantages of caudal block for perineal surgery in out-patients were shown to include the absence of adverse cardiac and laryngeal vagal reflexes and persistence of sacral analgesia postoperatively together with rapid mobilization. The rapid and extensive analgesia of carbonated lignocaine was shown to further enhance this technique.
*Present address: Department of Anesthesia, Stanford University School of Medicine, Stanford, California 94305, U.S.A.